Reuters: Germany will host an extra session of U.N. climate talks in April but it is too early to say if the world will agree a new treaty this year after falling short at a summit in Copenhagen in December, Denmark said on Monday. “The negotiations are picking up speed again after Copenhagen,” Danish Climate and Energy Minister Lykke Friis, who presides over the U.N. negotiations, told Reuters by telephone. She said that 11 representatives of key nations decided at a one-day meeting at …